isConvexByDihedralAngleCount MethodStatic

Test for convex volume by dihedral angle tests on all edges.

• This tests if all dihedral angles of the mesh are positive.
• In a closed solid, this is a strong test for overall mesh convexity with outward facing normals.
• See dihedralAngleSummary for the definition of "dihedral angle".
• With ignoreBoundaries true, this may be a useful test when all the facets are in a single edge-connected component, such as a pyramid with no underside.
• It is not a correct test if there are multiple, disjoint components.
• Take the above-mentioned pyramid with no underside.
• Within the same mesh, have a second pyramid placed to the side, still facing upward.
• The angles will pass the dihedral convexity test, but the composite thing surely is not convex.

isConvexByDihedralAngleCount(source: PolyfaceVisitor | Polyface, ignoreBoundaries: booleanfalse): boolean

@returns true if all dihedral angles of the mesh are positive.

Returns - boolean

true if all dihedral angles of the mesh are positive.

Defined in

• polyface/PolyfaceQuery.ts Line 581